As the title states, the delivery and service from parts geek was efficient; but I've been hunting down carriage bolts to mount my new muffler for about a week now. The bolt needed for install was an M10 x 1.50 carriage bolt; the equivalent standard size is a 7/16 x 14. The reason I needed a carriage bolt was due to the rectangle index/hole located on the muffler flange.

Since I couldn't find these bolts on parts geek, I've tried multiple hardware stores and several auto parts stores to track down these parts needed; I even tried a Nissan dealership with no avail.

The original bolts that were on my car was so corroded that I needed to cut the mounting bolts off with an angle grinder and cutting wheel.

I'm not trying to complain or anything within that manner, I just want to get this information out so future buyers are better prepared for the situation; or be ready to modify the job through adaptations.